A3977 Allegro MicroSystems, Inc., A3977 Datasheet - Page 2
A3977
Manufacturer Part Number
A3977
Description
Microstepping DMOS Driver with Translator
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
1.A3977.pdf
(18 pages)
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V
3977
MICROSTEPPING DMOS DRIVER
WITH TRANSLATOR
PFD
SUPPLY
SUPPLY
LOGIC
REF.
ENABLE
RESET
SLEEP
HOME
STEP
MS
MS
RC
V
REF
DIR
SR
DD
1
2
1
PFD
RC
2
FAULT
UVLO
AND
4
4
DAC
DAC
2 V
PWM LATCH
BLANKING
MIXED DECAY
PWM LATCH
BLANKING
MIXED DECAY
PWM TIMER
PWM TIMER
+
+ -
REGULATOR
BANDGAP
-
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2002, 2003 Allegro MicroSystems, Inc.
SENSE
1
V
V
REG
CP
DMOS H BRIDGE
DMOS H BRIDGE
CHARGE
PUMP
CP
2
CP
1
V
V
OUT
OUT
SENSE
V
OUT
SENSE
OUT
CP
BB1
BB2
1B
2B
1A
2A
1
2
Dwg. FP-050-2
SUPPLY
LOAD
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